AMD Radeon R9 255 OEM vs NVIDIA GeForce GTX 645 OEM

VS

AMD Radeon R9 255 OEM

NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 255 OEM and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 255 OEM 's Advantages

Released 8 months late

Boost Clock930MHz

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (73.60GB/s vs 64.00GB/s)

NVIDIA GeForce GTX 645 OEM 's Advantages

64 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 255 OEM

0.952 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon R9 255 OEM

VS

GeForce GTX 645 OEM

Graphics Card

Dec 2013

Release Date

Apr 2013

Volcanic Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

900 MHz

Base Clock

-

930 MHz

Boost Clock

-

1150 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

73.60GB/s

Bandwidth

64.00GB/s

Render Config

8

Compute Units

-

512

Shading Units

576

32

TMUs

48

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

14.88 GPixel/s

Pixel Rate

9.888 GPixel/s

29.76 GTexel/s

Texture Rate

39.55 GTexel/s

-

952.3 GFLOPS

FP32 (float)

949.2 GFLOPS

59.52 GFLOPS

FP64 (double)

39.55 GFLOPS

Board Design

65W

TDP

65W

250 W

Suggested PSU

250 W

No outputs

Outputs

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

1x 6-pin

Power Connectors

None

Graphics Processor

Cape Verde

GPU Name

GK106

Cape Verde PRX

GPU Variant

GK106-200-A1

GCN 1.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.5 billion

Transistors

2.54 billion

123 mm²

Die Size

221 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

5.1

Shader Model

5.1

Related GPU Comparisons

1

AMD Radeon R9 255 OEM vs AMD Radeon RX 7900 GRE

2

AMD Radeon R9 255 OEM vs 3dfx Voodoo4-2 4200 PCI 16 MB

3

AMD Radeon R9 255 OEM vs NVIDIA GeForce 9500 GT Rev. 2

4

AMD Radeon R9 255 OEM vs NVIDIA GeForce 8800 GTS 512

5

AMD Radeon R9 255 OEM vs Intel Arc A350

6

AMD Radeon R9 255 OEM vs AMD Radeon HD 6290

7

AMD Radeon R9 255 OEM vs NVIDIA GeForce 7600 GT AGP

8

AMD Radeon R9 255 OEM vs NVIDIA GeForce GTX 1060 6 GB GDDR5X

9

AMD Radeon R9 255 OEM vs AMD Radeon HD 6490

10

AMD Radeon R9 255 OEM vs NVIDIA GeForce GTS 450 Rev. 3

Related News

1

Continuous Decline in DRAM Memory Prices: Downward Trend Intensifies

2

NVIDIA GB202 Chip Unveiled for the First Time, to be Used in RTX 5090 with 512-bit GDDR7 Memory

3

Strix Halo Integrated Graphics Score Appears on Passmark, Currently Slightly Below RTX 3060 12GB

4

AMD Unveils New RX 9070 XT Graphics Card Performance: Positioned Between RX 7900 GRE and RX 7900 XT

5

Double the Excitement! AMD FSR 4.0 to Launch Alongside RX 9070 XT Graphics Card

6

CPU-Z Minor Update: Support for Intel's Four New Products and New Memory

7

CXMT Reportedly Achieves 80% Yield in DDR5 Production

8

Intel Wildcat Lake Appears on Shipping List with FCBGA1516 Socket, Poised to Replace Alder Lake-N

9

The Commencement of ARM and Qualcomm Licensing Dispute Trial: Potential Major Impact on PC Market

10

NVIDIA Allegedly Equips RTX 5080 with 30Gbps Memory Speed, Other Models to Feature 28Gbps